Improvement in water-pressure pumps



I a Sheets-Sheet 1. H. DAVEY.

WATER'PRESSURE-PUMP.

No. -173,595. Patented Feb.15, 1876.

2 9! yfym N. WHERE: PH m-u 0e mum WASHINGT UN TED STATES PATEN @QFFIGEHENRY DAVEY, OF LEEns, ENGLAND.

IMPROVEMENT IN WATER-PRESSURE PUMPS.

Specification forming part of Letters Patent No. 173,595, dated February15, 1876; application filed December 2, 1875.

my invention may be distinguished from others of a similar class,together with such parts as I claim and desire to secure by LettersPatentthat is to say:

My invention relates to a construction of vertical pump worked bywater-pressure, ap-

plicable in such situations as a deep well or mine shaft, and capableot'being conveniently applied during the sinking of such well or shaft. Thechief object of my invention is to provide for removing and replacingthe bucket and valves, and for extending the pump downward as the shaftis deepened without the loss of time and labor involved when theseoperations have to be efiected on pumps worked by rods.

I will describe the said construction, referring to the accompanyingdrawings.

Figure 1 represents a section of a shaft, with an elevation of the pumpplaced therein, and of the framing and gear connected with it at the topof the shaft. section of the pump; Fig. 3, a vertical section of thevalve-box, valves, and slides for effecting the reciprocation of thepump-bucket; and Figs. 4 and 5 show, respectively, a vertical sectionand sectional plan of the joints of the discharge'pipe andpressure-pipe.

The body of the pump consists of two partsthe upper part A, in which thebucket B works, and the lower cylindrical part G, in which works apiston, D, connected to the bucket B by a rod, d. Around the lowercylindrical part 0 is an annular passage, by which water ascends to thebody of the pump through the suction-valves b. The deliveryvalves arefitted on the bucket B. The discharge-pipe it extends upward to the topof the shaft, of a diameter somewhat greater than the bore of the barrelA, so that the 5 and its attachments. drum F is an eccentric or crank,f, which works a lever, L. To the end of this lever is Fig. 2 isavertical bucket can be readily raised by a rope or chain, E, the wholeheight of the shaft. When it is so raised the piston AD, catching underthe seating'of the suction-valves 1), brings them up with it and thusall the working parts of the pump can be conveniently raised forinspection or repair, and replaced, without breaking any joints orconnections. The bucket B is attached to the rope or chain E, whichpasses over a pulley, e, and round a drum, F, and has attached to it acounter-weight, G, which balances a portion of the weight of the bucket0n the shaft of the jointed a ta-ppet-rod, l, that, by means of abell-crank, works a slide, S, of ordinary D-' form, which commands adischarge-port and a port, communicating by a pipe, 8, with the bottomof a valve-box, H. The slide-jacket is supplied with water underpressure from the pipe N, which leads from an accumulator or head at ahigh level, and which communicates with the middle of the valve-box H.From the upper part of the valve-box H a pipe, 0, is led down the shaftto the lower part of the pump 0 and from the same valvebox H there is aside branch, M, for discharge of the water after ithas worked the pump.Within the valve-box His a sliding Valve, Q, on which seats aclack-valve, R, connected by a rod, 1', to a piston, P, of largerdiameter than the valveR, fitted to work in the lower part of thevalve-box.

In order to explain the working of the pump, I will suppose that thepiston I) and bucket B are at the extreme of their downstroke; also,that the piston P is at the bottom of the valve-box, having drawn downthe clack-valve R and the sliding valve Q, and so having closed the pipe0 from the pressurepipe N, but having opened it to the discharge M. Butthe bucket in descending, by draware, then acting on the slide Q andclack-.

valve R, raises them, covering the opening of the discharge-pipe M, andopening a communication from the middleot' the valve-box H to the pipeO.Water under pressure now flows from N past the open valve B into 0, anddown the shaft to the bottom of the pump, where it presses on the underside of the piston D, raising it and the bucket B connected to it. Thebucket, in rising, draws water into the pump through the suctionvalvesb, and discharges a portion of the water above it by the discharge-pipea, and at the same time slacking the rope or chain E allows thecounter-weight G to descend, turning the drum F backward. By thismovement of the drum F and its eccentric or crank f, the slide S ismoved so as to cut off the pipe 8 from the water-supply and put it incommunication with the discharge-port of the slide. The under side ofthe piston P being thus relieved of pressure, it is forced down by thesuperior pressure on its upper surface, and in descending it closes theclack-valve R and moves down the slide Q so as to open the pipe 0 to thedischarge M. The under side of the piston D being thus relieved ofpressure, that piston and the bucket B descend, drawing down the rope orchain E, which turns the drum F, and its crank or eccentric f againmoves the slide; whereupon the action of the pump is repeated, asalready described.

To facilitate the extension of the pump downward as the shaft becomesdeepened, I prefer to make the upper part of the pipe 0 to slidetelescopically. When the shaft becomesdeepened to the extent of a lengthof pipe it is necessary only to undo the upper joints of the pipe 0 andinsert a fresh length of pipe; also, to add to the discharge-pipe a andto the rope or chain E. To facilitate the lifting of the bucket, piston,and valves of the pump for inspection or repairs, I prefer to provide onthe frame of the drum F a hydraulic engine, V, (or it might be asteamengine,) connected by gearing to the drum, which can by this meansbe caused to revolve, as occasion may require, so as to haul the rope orchain, E.

Having thus described the nature of my invention, and the best means Iknow of carrying it into practical effect, I hereby declare that I makeno general claim to the working of pumps by hydraulic pressure but Iclaim,

.in respect to water-pressure pumps for wells or shafts- 1. The verticalpump, constructed substantially as hereinbefore described, consisting ofthe barrel A, fitted with the bucket B and discharge-valves thereon, thecylindrical extension C, fitted with its piston D, connected to thebucket B, and the suction-valves b, all arranged in relation to thedischarge-pipe a in such manner that the working parts can be readilyraised by a rope or chain, E, for purposes of inspection or repair.

2. The combination of the pump 0, piston D, pump-bucket B, rope or chainE, drum F, and eccentric or crank f, with the slides, valve-box H, andpipe 0 leading from the valve-box H to the pump 0, substantially as andfor the object specified.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 19th day of October, 1875.

. HENRY DAVEY. Witnesses:

CHARLES D. ABEL, JOHN IMRAY.

